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From "Christian Moen (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-3901) Add katakana stem filter to better deal with certain katakana spelling variants
Date Sat, 24 Mar 2012 08:11:22 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christian Moen resolved LUCENE-3901.
------------------------------------

    Resolution: Fixed
    
> Add katakana stem filter to better deal with certain katakana spelling variants
> -------------------------------------------------------------------------------
>
>                 Key: LUCENE-3901
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3901
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: modules/analysis
>            Reporter: Christian Moen
>            Assignee: Christian Moen
>             Fix For: 3.6, 4.0
>
>         Attachments: LUCENE-3901.patch, LUCENE-3901.patch, LUCENE-3901.patch
>
>
> Many Japanese katakana words end in a long sound that is sometimes optional.
> For example, パーティー and パーティ are both perfectly valid for "party". 
Similarly we have センター and センタ that are variants of "center" as well as サーバー
and サーバ for "server".
> I'm proposing that we add a katakana stemmer that removes this long sound if the terms
are longer than a configurable length.  It's also possible to add the variant as a synonym,
but I think stemming is preferred from a ranking point of view.

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